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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        function Person() {
            this.name = 'zs'
            this.age = 20
        }
        Person.prototype.a = 200
        Person.prototype.fn = function () {
            console.log(123);
        }

        // 只拿到Person.prototype上的东西
        console.log(Object.create(Person.prototype));
    </script>
</body>

</html>